US3213277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apertured correcting diaphragm to reduce astigmatism in electron lens system
Assignee: Siemens and Halske AG
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Filing: 1962-07-12
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Granted: 1965-10-19
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Expires: 1982-07-12
Abstract
No abstract record available.
Inventors
- 👤 Hoppe Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:04
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/42; G02B27/4205; G02B27/4216; G02B27/0025; G02B27/0037; G02B5/00; G02B5/18; G02B5/1876; H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/10; H01J37/153
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A SYSTEM FOR AT LEAST PARTIALLY OVERCOMING THE DISTURBING EFFECT PRODUCED IN AN IMAGE FORMED BY ELECTRONOPTICAL MEANS DUE TO APERTURAL AND AXIAL ASTIGMATISM IN AN ELECTRON-OPTICAL LENS SYSTEM THROUGH WHICH THE IMAGEFORMING RAYS PASS AND DIRECTED ALONG A PATH TOWARD AN ARBITRARY SPACE POINT ON AN IMAGE PLANE, SAID SYSTEM INCLUDING A CORRECTING DIAPHRAGM POSITIONED IN SAID PATH, SAID DIAPHRAGM COMPRISING A PLURALITY OF RAIDALLY SPACED ELECTRON OPAQUE PARTS AND MEANS MAINTAINING SAID PARTS IN RADIAL SPACED RELATION TO FORM A PLURALITY OF CONCENTRIC ALTERNATE OPAQUE AND TRANSPARENT ZONES PROVIDING SEVERAL ELECTRON ADMISSIVE ZONES ARRANGED IN SUCH A MANNER THAT OF THOSE ELEMENTARY IMAGE SIDE WAVES WHICH EMANATE FROM THE WAVE SURFACE WHICH IS CREATED IN THE LENS SYSTEM AND ARE DIRECTED THROUGH SAID CORRECTING DIAPHRAGM ALONG SAID PATH TOWARD SAID ARBITRARY PACE POINT ON SAID IMAGE PLANE, ONLY THOSE WAVES OF UNIDIRECTIONAL PHASE ARE PERMITTED TO REACH THE SAID POINT DUE TO THE FILTERING ACTION OF SAID CORRECTION DIPHRAGM.
Claim 2
Independent Claim
161 words
A SYSTEM FOR AT LEAST PARTIALLY OVERCOMING THE DISTURBING EFFECT PRODUCED IN AN IMAGE FORMED BY ELECTRONOPTICAL MEANS DUE TO APERTURAL AND AXIAL ASTIGMATISM IN AN ELECTRON-OPTICAL LENS SYSTEM THROUGH WHICH THE IMAGEFORMING RAYS PASS AND DIRECTED ALONG A PATH TOWARD AN ARBITRARY SPACE POINT ON AN IMAGE PLANE, SAID SYSTEM INCLUDING A CORRECTING DIAPHRAGM POSITIONED IN SAID PATH, SAID DIAPHRAGM COMPRISING A PLURALITY OF RAIDALLY SPACED ELECTRON OPAQUE PARTS AND MEANS MAINTAINING SAID PARTS IN RADIAL SPACED RELATION TO FORM A PLURALITY OF CONCENTRIC ALTERNATE OPAQUE AND TRANSPARENT ZONES PROVIDING SEVERAL ELECTRON ADMISSIVE ZONES ARRANGED IN SUCH A MANNER THAT OF THOSE ELEMENTARY IMAGE SIDE WAVES WHICH EMANATE FROM THE WAVE SURFACE WHICH IS CREATED IN THE LENS SYSTEM AND ARE DIRECTED THROUGH SAID CORRECTING DIAPHRAGM ALONG SAID PATH TOWARD SAID ARBITRARY PACE POINT ON SAID IMAGE PLANE, ONLY THOSE WAVES OF UNIDIRECTIONAL PHASE ARE PERMITTED TO REACH THE SAID POINT DUE TO THE FILTERING ACTION OF SAID CORRECTION DIPHRAGM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |